This document provides guidance on subject heading searching in CINAHL, the Cumulative Index to Nursing and Allied Health database. It uses the example search topic "pressure sores among nursing home residents" to demonstrate how to identify relevant subject headings, perform searches using those headings both individually and combined, and refine the search results. The document also briefly covers keyword searching as an alternative to subject headings and creating a CINAHL user account to save searches and set up email alerts.